Improvement in rotary pumifs



`N. PETERS. HOTO-LITNDGRAPWER, WASHINGTON, D. C.

i blower.

N 'delitti States @anni elettive.

cnAnLEs W. IsBnLt; or NnW'YonK, N. Y.

Letters Patent No; 98,772, dated Janna/ry 11, 1870; mztedateal January6, 1870.

/ MOH* The Schedule referred to in these Letters Patent and making partof the same` To all who-m it may concern:

Be it known that I, CHARLES W. IsBnLL, of the city, county, and State ofNew York, have invented a new and useful Improvement in `Pumping orBlow- Similar letters of reference indicate corresponding parts.

character, for pumping, blowing, and other purposes,

in which there is arranged within an outer cylinder,`

provided with suitable inlet and outlet-openings in or near itsperiphery, a'rotatng carrier, that has its anis eccentric to that of thecylinderfand that has hinged to it-a series of buckets or blades, which,during their rotation in common with the carrier, open and close,relatively to the latter, to receive land discharge the air or liuid.

The invention, in this connection, consists- First, in the constructiono f the hinged blades, ot' a curvature corresponding to that of theouter case' or cylinder. Y

Secondly, in the construction of the revolving eccentric carrier, of aseries of similar sweeps or curves. By this construction of the bladesand carrier, waste or leakage is prevented back, past, rerover theblades, and the same made self-packing, or presenting such extendedouter surface as that' packing may be dispensed with; also, air oriiuid, received through -the inlet, is prevented from being w'orkedarouudwith the Y carrier, and its delivery at the outlet made positiveor certain;` likewise an increased v.capacity secured for or to thebuckets.

Thirdly, the invention consistsin a combination, with the hinged blades,of shoes, pivoted to the blades, near their side edges, in rear of theirfront edges, and arranged to travel in grooves cut in the ends or coversofthe outer case, to direct the blades in their opening and closingactions, and relieve them from frictional contact with the outer case;Valsoto preventthe front edges of the blades from impinging on oragainst the periphery of said case.

This latter feature of the invention is only applicable when the machineis driven by power applied to the carrier-shaft, as when working itV asa pump or the duid passing through it, which drives it in an op- Myimprovement relates to maehines'of a rotary NVhen operated by the.weightor pressure of' the inlet and outlet, as in working it as 'awater-propelled engine or meter, then the grooves .and guidingshoes maybe dispensed with, and the machine preferably arranged so that its mainshaft stands vertical.

It will snice here, however, to describe the invention when `used as apump or blower, and, for the purpose of illustration, I shall select thelatter application of it, the modus operandi being the saine when themachine is used as a pump for working liquids.

Referring tothe accompanying drawing- A is the outer cylinder o1"` case,provided in its periphery with an inlet-opening, a, and outlet b.

B B are the cylinder ends'lor covers.

C is therevolving carrier, arranged toextend the length of the cylinder,and secured to a driving-shaft, D, which is eccentric to the cylinder.

This carrier is constructed Ato carry any desired number of buckets orblades, E E E', jointed or hnged, as at c c c, to the carrier, at anequal distance apart, and at equal distances from the driving-shaft D.

These blades, which are of thesame length as the interior of thecylinder A, are preferably made of sheet-metal, and, though attached toan eccentricallyarranged carrier, are of corresponding curvature to thatofthe cylinder A, so thatwhen the carrier C revolves, as indicated bythe arrow in fig. 2, they lie for their whole length and breadth.against the inner periphery of the-` cylinder A during a large portionof ltheir travel, that is, while they pass from the outlet b to theinlet a.

By this curved construction of the blades or buckets, they are madesellpacking, or havev such an ex-` tended outer 'surface in proximitytothe cylinder as to render specialpacking unnecessary, and air, enter-`ing at theinlet (this prevented from leakingI back, past,

or over them, to the outlet.

The carrier C is also made up of a series of curvatures, d el d,colresponding to, or having the' same length of radins as the cylinderA, (less the thickness of the blades,) though struckfrom dilierentcentres arouudthe shaft D, so that when the blades, though of likecurva-tures to that of the cylinderA, shut down upon-the carrier,after,tl1ey have expelled the air through the outlet l), they establisha close tit with or on the carrier throughout theirlen'gth andbreadth,

and prevent air from passing around with the carrier,

and insure its expulsion through the outlet. Such construction, too, ot'the carrier-surface, gives larger bucket-space than were the carrier ofa cylindrical form.

To insure the timely action of the blades or buckets, as regards theiropening and closing to `receive and discharge ,the air, and to make atintervals, as described, a close fit throughout their length and breadthwith the cylinder and carrier Working therein, I pivot to said bla'des,at or near their side edges, and in rear of their front edges, as at c ee, slices FF F, which 'are arranged to 'travel in suitableeccentric-shaped grooves, G G, cut or formed in the inner yfaces of thecylinder-covers. These shoes, througli`the aid of the eccentric grooves,direct the opening and closing action ofthe blades, and relieve themfrom friction ou or against the outer cylinder or case. By the,ypivotedarrangement of said shoes in rear of the front edges of theblades, the latter are prevented from impin ging or digging, as it were,when assuming certain angles or positions, into the periphery of theouter cylinder, and thus sticking is avoided. v

What is. here. claimed, and'dcsired to be secured by l. The combination,with the outer cylinder or case A, and eccentrically-hung rotatingcarrier D therein,

of the buckets or blades E E, hinged to said carrier, but of curvatnres,on their outer surfaces, corresponding to that of the cylinder,substantially as speci'ed.

2. The combination, with the outer cylinder or case A, of' theeccentrically-hung rotating carrier D, made up of a series of curves onits face, corresponding to that of the cylinder, less the thickness' ofthe blades', hinged to said carrier, essentially as shown anddescribed.I

3. The' combination, with the guiding-grooves G in the cylinder ends orcovers, of the pivoted shoes F to the side edges of the blades orbuckets, arranged to direct said blades, substantially as herein setforth. CHAS. W. ISBELL.

Witnesses: I FRED. HAYNES,

J. W. GooMBs.

